This work was copyright 1937, but copyright was not renewed as would then have been required to secure its continuance. It therefore passed into the public domain upon the expiration of its initial copyright. This digital reprint remains in the public domain.
Essay on the contributions of Chicago matrix engravers and typefounders. This ia a primary source of information on the little-known but extremely important punch & matrix engraver and typeface designer Robert Wiebking.